## KJ4UTS one year ago Find an equation of the line satisfying the conditions below. Describe your work. x-intercept = 5, and y-intercept = -2 Find the slope-intercept form of the line. Hint: These intercepts give you 2 points; a good way to start is to find the slope using these 2 points

1. pooja195

y=mx+b b=y intercept m=slope

2. KJ4UTS

@pooja195 y=5+-2 im not sure what goes for y and how to find the slope?

3. pooja195

We need to graph it and get the slope using rise/run

4. KJ4UTS

so I just have to graph y=5+-2?

5. pooja195

No graph the intercepts

6. pooja195

|dw:1441992045141:dw|

7. KJ4UTS

so just graph (5, -2)?

8. pooja195

Not try finding the slope :)

9. KJ4UTS

Isn't it rising up 1over 1

10. pooja195

Start by rising up from the y axis....

11. KJ4UTS

the y axis is rising straight up? going up 1

12. pooja195

13. KJ4UTS

x / 5 + y / -2 = 1 is this the equation ?

14. pooja195

No :/

15. pooja195

WAIT i got this! >:)

16. pooja195

|dw:1441993143603:dw|

17. triciaal

do you still need my input?

18. pooja195

Can you tell me if im doing this right or not?

19. triciaal

well give me a few minutes need to start at the top

20. pooja195

@KJ4UTS is this timed ?

21. triciaal

x-intercept = 5, and y-intercept = -2 points (5, 0) and (0, -2)

22. triciaal

slope m = change in y / change in x = y2 - y1/(x2- x1) for points (x1, y1 and (x2, y2)

23. triciaal

slope is the same for any 2 points on the line using this slope and one of the given points with any point (x, y) equation of the line in slope intercept form y = m x + b b is the y-intercept the value of y when x = 0

24. triciaal

what is the value for the slope?

25. KJ4UTS

2/5?

26. triciaal

|dw:1441993662201:dw|

27. KJ4UTS

oh I see sorry I forgot to add the -

28. KJ4UTS

would this be the equation y= -2/5 x - 2

29. triciaal

|dw:1441993751023:dw|

30. triciaal

|dw:1441993867203:dw|

31. triciaal

32. KJ4UTS

I see so there is no - in front of the 2/5 The equation is just y=2/5 x - 2

33. triciaal

|dw:1441994046135:dw|

34. triciaal

do you understand why?

35. triciaal

the direction matters when moving from one point to the other

36. triciaal

|dw:1441994504313:dw|

37. pooja195

So i was doing it correctly...

38. triciaal

|dw:1441994648251:dw|

39. KJ4UTS

the -2/ -5 makes it positive

40. triciaal

my point is the direction

41. triciaal

correct

42. pooja195

Now finish off the problem y=mx+b b=y intercept m=slope